209 lines
7.3 KiB
Markdown
209 lines
7.3 KiB
Markdown
<!-- BANNER_TPL_BEGIN -->
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About Daplie: We're taking back the Internet!
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--------------
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Down with Google, Apple, and Facebook!
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We're re-decentralizing the web and making it read-write again - one home cloud system at a time.
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Tired of serving the Empire? Come join the Rebel Alliance:
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<a href="mailto:jobs@daplie.com">jobs@daplie.com</a> | [Invest in Daplie on Wefunder](https://daplie.com/invest/) | [Pre-order Cloud](https://daplie.com/preorder/), The World's First Home Server for Everyone
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<!-- BANNER_TPL_END -->
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letsencrypt-express
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===================
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[](https://gitter.im/Daplie/letsencrypt-express?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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| [letsencrypt (lib)](https://github.com/Daplie/node-letsencrypt)
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| [letsencrypt-cli](https://github.com/Daplie/letsencrypt-cli)
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| **letsencrypt-express**
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| [letsencrypt-cluster](https://github.com/Daplie/letsencrypt-cluster)
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| [letsencrypt-koa](https://github.com/Daplie/letsencrypt-koa)
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| [letsencrypt-hapi](https://github.com/Daplie/letsencrypt-hapi)
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Free SSL and managed or automatic HTTPS for node.js with Express, Koa, Connect, Hapi, and all other middleware systems.
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* Automatic Registration via SNI (`httpsOptions.SNICallback`)
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* **registrations** require an **approval callback** in *production*
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* Automatic Renewal (around 80 days)
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* **renewals** are *fully automatic* and happen in the *background*, with **no downtime**
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* Automatic vhost / virtual hosting
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All you have to do is start the webserver and then visit it at its domain name.
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Install
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=======
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```bash
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npm install --save letsencrypt-express@2.x
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```
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**Important**: Use node v4.5+ or v6.x, node <= v4.4 has a [known bug](https://github.com/nodejs/node/issues/8053) in the `Buffer` implementation.
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QuickStart
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==========
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Here's a completely working example that will get you started:
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`app.js`:
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```javascript
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'use strict';
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require('letsencrypt-express').create({
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server: 'staging'
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, email: 'john.doe@example.com'
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, agreeTos: true
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, approveDomains: [ 'example.com' ]
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, app: require('express')().use('/', function (req, res) {
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res.end('Hello, World!');
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})
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}).listen(80, 443);
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```
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Certificates will be stored in `~/letsencrypt`.
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**Important**:
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You must set `server` to `https://acme-v01.api.letsencrypt.org/directory` **after**
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you have tested that your setup works.
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Why You Must Use 'staging' First
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--------------------------------
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There are a number of common problems related to system configuration -
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firewalls, ports, permissions, etc - that you are likely to run up against
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when using letsencrypt for your first time.
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In order to avoid being blocked by hitting rate limits with bad requests,
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you should always test against the `'staging'` server
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(`https://acme-staging.api.letsencrypt.org/directory`) first.
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Migrating from v1.x
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===================
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Whereas v1.x had a few hundred lines of code, v2.x is a single small file of about 50 lines.
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A few important things to note:
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* Delete your v1.x `~/letsencrypt` directory, otherwise you get this:
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* `{ type: 'urn:acme:error:malformed', detail: 'Parse error reading JWS', status: 400 }`
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* `approveRegistration` has been replaced by `approveDomains`
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* All of the behavior has moved to the various plugins, which each have their own options
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* Use https and http directly, don't rely on the silly `.listen()` helper. It's just there for looks.
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* `lex.createAcmeResponder()` is now `lex.middleware(require('redirect-https')())` or `lex.middleware(app)`
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Usage
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=====
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The oversimplified example was the bait
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(because everyone seems to want an example that fits in 3 lines, even if it's terribly bad practices),
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now here's the switch:
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`serve.js`:
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```javascript
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'use strict';
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// returns an instance of node-letsencrypt with additional helper methods
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var lex = require('letsencrypt-express').create({
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// set to https://acme-v01.api.letsencrypt.org/directory in production
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server: 'staging'
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// If you wish to replace the default plugins, you may do so here
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//
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, challenges: { 'http-01': require('le-challenge-fs').create({ webrootPath: '/tmp/acme-challenges' }) }
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, store: require('le-store-certbot').create({ webrootPath: '/tmp/acme-challenges' })
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// You probably wouldn't need to replace the default sni handler
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// See https://github.com/Daplie/le-sni-auto if you think you do
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//, sni: require('le-sni-auto').create({})
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, approveDomains: approveDomains
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});
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```
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```javascript
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function approveDomains(opts, certs, cb) {
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// This is where you check your database and associated
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// email addresses with domains and agreements and such
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// The domains being approved for the first time are listed in opts.domains
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// Certs being renewed are listed in certs.altnames
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if (certs) {
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opts.domains = certs.altnames;
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}
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else {
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opts.email = 'john.doe@example.com';
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opts.agreeTos = true;
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}
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// NOTE: you can also change other options such as `challengeType` and `challenge`
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// opts.challengeType = 'http-01';
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// opts.challenge = require('le-challenge-fs').create({});
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cb(null, { options: opts, certs: certs });
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}
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```
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```javascript
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// handles acme-challenge and redirects to https
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require('http').createServer(lex.middleware(require('redirect-https')())).listen(80, function () {
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console.log("Listening for ACME http-01 challenges on", this.address());
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});
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var app = require('express')();
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app.use('/', function (req, res) {
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res.end('Hello, World!');
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});
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// handles your app
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require('https').createServer(lex.httpsOptions, lex.middleware(app)).listen(443, function () {
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console.log("Listening for ACME tls-sni-01 challenges and serve app on", this.address());
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});
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```
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**Security Warning**:
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If you don't do proper checks in `approveDomains(opts, certs, cb)`
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an attacker will spoof SNI packets with bad hostnames and that will
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cause you to be rate-limited and or blocked from the ACME server.
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API
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===
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This module is an elaborate ruse (to provide an oversimplified example and to nab some SEO).
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The API is actually located at [node-letsencrypt options](https://github.com/Daplie/node-letsencrypt)
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(because all options are simply passed through to `node-letsencrypt` proper without modification).
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The only "API" consists of two options, the rest is just a wrapper around `node-letsencrypt` to take LOC from 15 to 5:
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* `opts.app` An express app in the format `function (req, res) { ... }` (no `next`).
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* `lex.listen(plainPort, tlsPort)` Accepts port numbers (or arrays of port numbers) to listen on.
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Brief overview of some simple options for `node-letsencrypt`:
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* `opts.server` set to https://acme-v01.api.letsencrypt.org/directory in production
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* `opts.email` The default email to use to accept agreements.
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* `opts.agreeTos` When set to `true`, this always accepts the LetsEncrypt TOS. When a string it checks the agreement url first.
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* `opts.approveDomains` can be either of:
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* An explicit array of allowed domains such as `[ 'example.com', 'www.example.com' ]`
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* A callback `function (opts, certs, cb) { cb(null, { options: opts, certs: certs }); }` for setting `email`, `agreeTos`, `domains`, etc (as shown in usage example above)
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* `opts.renewWithin` is the **maximum** number of days (in ms) before expiration to renew a certificate.
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* `opts.renewBy` is the **minimum** number of days (in ms) before expiration to renew a certificate.
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